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ADMOD1
Bit symbol
VREFON
(02B1H)
Read/Write
After reset
Function
VREF
application
control
0: OFF
1: ON
ADMOD2
Bit symbol
ADM27
(2B2H)
Read/Write
After reset
Function
ADMOD3
Bit symbol
ADM37
(2B3H)
Read/Write
After reset
Function
AD Mode Control Register 1
7
6
5
I2AD
R/W
R/W
0
0
IDLE2
0: Stop
1: Operate
AD Mode Control Register 2
7
6
ADM26
ADM25
0
0
AD Mode Control Register 3
7
6
ADM36
ADM35
1
1
Figure 3.11.3 AD Converter Related Register
91C829-145
4
3
ADTRGE
0
AD external
trigger start
control
0: Disable
1: Enable
Analog input channel selection
<SCAN>
<ADCH2:0>
000
001
010
011
100
101
110
111
AD conversion start control by external trigger
(
ADTRG
0
1
IDLE2 control
0
1
Control of application of reference voltage to AD
converter
0
1
Before starting conversion (before writing 1 to
ADMOD0<ADS>), set the <VREFON> bit to 1.
5
4
3
ADM24
ADM23
R/W
0
1
0
Please write 1E
5
4
3
ADM34
ADM33
R/W
0
0
1
Please write CF
TMP91C829
2
1
ADCH2
ADCH1
R/W
0
0
Analog input channel selection.
0
1
Channel
Channel
fixed
scanned
AN0
AN0
AN0 → AN1
AN1
AN0 → AN1 → AN2
AN2
AN0 → AN1 → AN2 → AN3
AN3
AN4
AN4
AN4 → AN5
AN5
AN4 → AN5 → AN6
AN6
AN4 → AN5 → AN6 → AN7
AN7
input)
Disabled
Enabled
Stopped
In operation
OFF
ON
2
1
ADM22
ADM21
0
0
2
1
ADM32
ADM31
1
1
0
ADCH0
0
0
ADM20
1
0
ADM30
1
2006-03-15
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